Heel breasting machine



May 26, 1931.

V F. A. DAY

HEEL BREASTING MACHINE Filed Aug. 15 1928 IIIIIIIHI 4 Sheets-Sheet 1 "um lul l a, WWW

May 26, 1931. F. A. DAY

HEEL BREASTING MACHINE Filed Aug, 15/ 1928' 4 She6ts-Sheet 2 May- 26, 1931. DAY

' HEEL BREASTING Immune:

Filed Aug. 15, 1928 4 Shuts-Sheet 3 May 26, 1931. F. A. DAY 1,807,153

HEEL BREASTING momma:

Filed Aug. 15. 1928 4 Sheets-Sheet 4 E JE Patented May 26, 1931 PATENT OFFICE ram) A. DAY, or COLUMBUS, orno HEEL BREASTING MACHINE Application filed August 15, 1928. Serial No. 299,839.

This invention relates to improvements in heel breasting machlnes, and has for 1ts pr1- mary object the provision-of a simple yet eflicient machine adapted for the purpose of curve breasting wooden heel blanks. Heels of the type employed particularly in connection with womens shoes and particularly that style known as Cuban type of heel includes a breast surface-which is concave transversely of the heel. Vertically these breasts are convexly curved from the tread to the heel seat. By providing the breast surface of the heel blank with this compound curvature the complete blank heel when finished produces what is known as a straight line effect at the planes of the j oinder between the breast surface of the heel and the curved or turned sides thereof. v

Heretofore ithas been customary toshape the breast surface of a heel blank as above described by arranging the heel blanks on a turnable support so that during the operaw tion of said support the breast surfaces of the heel blanks are presented to the cutting edge of a barrel-saw or crown type of cut ter, so that in swinging the support in order to move the heel blank past the cutter there is produced in the breast surfaces of the heel blank the compound curvature set forth, namely the concave curve horizontally and the convex vertically.

The present invention is directed to an improved machine by means of which this breasting operation may be more expeditiously and efiiciently carried out, and wherein the shape of the cutter produces of itself the compound curvature referred to, the holding or supporting means for the heel blanks. being entirely independent of the curvature produced on the breast surface of the blank.

The object of the invention resides ina heel breasting machine wherein is provided what is known as aform cutter which is shaped to produce both the convex and concave curvature in the breast surface of a heel blank wherein supporting means are provided for moving the heel blank to the cutting face of the cutter by substantially 50 a reciprocating motion in lieu of a rotary or turning motion and wherein the supporting means permit of the movement of the blank up to the cutter and away from the cutter butnot past the same.

WVith these and other objects in view, which I will appear as the description proceeds, this invention consists in the novel features of constructio-nconvenience and arrangements of parts, hereinafter fully described and pointed out in the appended claims.

In the accompanying drawings:

Figure l is a'view in side elevation of the heel breasting machine'c'omprising the present invention,

Figure 2 chine,

Figure 3 is an end elevation thereof,

Figure 4 is a vertical longitudinal view taken through the'machine onthe plane indicated by the line 4-4 of Figure 2,

Figure 5 is a similar view disclosing the heel blank in a clamped position and presented to the action of the formed cutter,

Figure 6 is a vertical sectional view on the plane indicated on the line 66 of Fig ure 5,

Figure 7' is a horizontal sectional view on the line 7-7 of Figure 5,

Figure 8 is a detailed perspective view of the movable clamping j aw,

Figure 9 is a view in side elevation of the pivoted blank gauge showing the latter in its active position,

Figure 10 is a similar view showing the gauge in its inactive position,

Figure 11 is a perspective View of a heel blank formed in accordance with the present invention,

Figure 12 is aside elevation thereof,

Figure 13 is a vertical longitudinal sectionaltview through the heel blank.

Figure 14 is a horizontal sectional view through said blank.

Referring more particularly to the drawings the numeral 1 designates the frame of the improved heel breasting machine. At one end of the frame there is mounted a. vertically disposed motor 2, the shaft of which drives a belt wheel 3. Around this wheel there passes an endless belt 4, which is also is a top plan view of said ma- 65 passed over a wheel 5 provided upon a vertically disposed cutter shaft 6. This shaft is journale-d in connection with bearings 7-7, mounted upon an upright standard 8, which forms a part of the frame 1.

The upper end of the shaft 6 carries a removable cutter 9. This cutter as shown, consists of a metal. body of tool'steel, formed to faces extend from the heel seat 16 of the heel to the heel top 17 when said blank'is considered from a standpoint of horizontal sections. The concave curvature of the cutter, as viewed in Figure 4, is suchas to produce convex surfaces as in 18 on the heel blanks, which surfaces extend vertically from the heel'seat to the heel top. When the heel blank is finished the sides 19 thereof are always curved or turned, as indicated in Figures 11 to 14, and it is by virtue of the curved surfaces confining the'sides 19 to the com ound surfaces of the breast of the heel blan that there is provided on the latter, when it is finished, the straight side edges 20 which have been indicated most clearly in Figure12. In the present invention it is to be seen that by moving the heel blank 15 outwardly to the cutter, the construction ofv the latter alone produces the compound curvature in said heel surface and in this manner the machine is independent of the means for holding and advancing the heel blanks into engagement with the cutter. As previously stated, this is a marked contrast with machines heretofore developed forefl'ecting this operation. The. essential feature of the present invention therefore consists in the shape of the cutter 9. This cutter is removably mounted on the upper end of the shaft 6 to permit convenience in substitution of cutters and to adapt the machine readily to heel blanks of varying sizes and forms.

To advance the heels into engagement with the cutter there has been shown a particular type of table or support, although if desired any ordinary form of table' may be used which may be situated near the cutter by means of which blanks may be fed by hand into engagement with the cutter. In the present instance, however, the supporting means comprises an upright 21, which is hinged as at 22 at its lower end in connection with the frame 1 I do not limit myself to a hinged construction since the upright may slide, in fact, the length of the upright 21 is are united by a turn buckle 27, by means of which the operative position of the table in relation to the upright may be operated and maintained.

Mounted on the upper surface of the table 23 is an angle member 28 and to the vertical leg of this member there is secured as at 29 for vertical adjustments a guide member 30.

The front wall of this member, as shown in Figure 7 is provided with a dove tail groove 31, in which is positioned for starting movement the correspondingly formed rib 32 provided upon avertically movable clamp 33.

During the time when the heel blank is presented to the action of the cutter 9, the heel blank is clamped in connection with the table 23by the clamp 33. This is .accomplished by loosely connectingwith theupper end of the clamp 33 one endof a lever 34, which is pivoted as at 35 on the guide member 30. The rear end of the lever 34 includes a cam surface 36, with which is engaged the short frame of a bell crank lever 37 which is also pivotally mounted as at 38 on the angle member 28.

The outer end of the entireframe of the lever 37 is formed to include a roller 39, which is disposed for engagement with a cam rib 40 provided on the under surface of a stationary frame. section 41, the latter being fixedto the stationary upright or standard 8. It will be seen, by reference to Figure 4, that when the heel blank is spaced from the cutter or when the table 23 occupies an inactive or'retracted position, the roller 39 will be located in front of the rib 40 but, as shown in Figure 5, when the table is advanced to bring the heel blank into engagement with the cutter, the roller 39 will engage with the forward or under side of the rib 40, so as to rock the lever 34 and thereby" force the beveled gripping edge 42 of the clamp 33 into secure holding engagement with the heel blank throughout the entire period when the heel blank is being subjected to the action of the rotary and formed cutter. A spring 43 co-operates with the bell crank lever 37to maintain the roller 39 thereof in constant en gaJgement with the various surfaces of the ri 40.

To govern the positions of the heel blank mounted as at 45 on the swinging upright 21, and the lower end of the blade includes a. roller 46, which is adapted to ride u on an inclined blade 47 carried by the stan ard 8. When the table is moved away from the cutter and the clamping mechanism elevated the gauge blade responding to the influences of a spring 48 moves upwardly so that the removable gauge strip 49 carried thereby projects slightly above the upper and forward edge of the table 23. This projecting portion of the strip 49 serves as a stop against which the operator of the machine may place the heel blank upon which the breast surfacing operation is to be performed. Then, as the table advances 'to present the heel blank to the cutter the roller 46 riding upwardly upon the inclined blade 47, swings said gauge blade so that the strip 49 will be positioned below the upper edge of the table, as shown in Figure 10, and out of the way of the cutter proper. The gauge blade assumes the position shown in Figure 10 during the entire period of engagement between the heel blank and the cutter.

To effect the automatic advance and return movement of the work-supporting table, there is mounted upon the inclined struts'50 of the frame 1 a bed plate 51. Mounted on the bed plate 51 is a motor 52, whose shaft is provided with a pulley. From this pulley'there is passed a belt 53 which leads to a speed reducing mechanism 54, also-mounted on the bed plate 51. The driving shaft of the mechanism 54 includes a disc 55 to which is eccentrically secured an adjustable strap 56, the latter having its forward end connected with a U shaped yoke 57, which surrounds the shaft 6, and the forward ends of the yoke 57 .are pivotally connected with the upright 21 as indicated at 58. It will be seen that by adjustment between the disc 55 and the strap 56, the throw or movement of the table may be regulated to control the depth of the cut produced in the blank. Another adjustment is secured by the turn buckle 27 for the purpose of vertically adjusting the position of the heel blank in relation to the cutter. These combined adjustments adapt practically any type of Cuban heel to the machine. A third adjustment is of course secured by changing the sidesof the cutter 9. These cutters are so formed that they can be readily applied to or removed from the upper end of the shaft 6.

In view of theforegoing it will be seen that by virtue of the construction designated that a sim 1e and improved machine is provided for hreasting a heel blank to produce said side edges on such a heel blank where the sides of the blank meet the breasting surface thereof. It will be understood that the heel blanks may be placed by hand on gauge stripl 49 and that after the breasting operation as beencompleted, the finished blank may be removed from the table by the operator and another blank placed thereon. Theessential feature of the present invention resides in the construction. of the cutter which is formed or shaped so that of itself to produce on thebreast surface of a heel.

blank, a sharp curvature or formation as indicatedand which surface ischaracterized by its smooth finish, absence of roughness and other imperfections which have heretofore required an additional sanding or buffing operation.

VVhatis claimed is: v I

1. In a heel breasting machine, a rotatively mounted cutter, said cutter being formed to comprisea body which carries a plurality of rigidlymounted cutting blades, said blades being disposed in circular order about said V body and extending longitudinally and helically with respect to said body, the cutting edges of said lades being curved .arcuately so that one end of said cutter possesses greater diameter than the opposite end.

2. In a heel breasting machine, a rotary cutter formed to comprise a body from which rigidly projects a plurality of circularly arranged cutting blades which extend longi tudinally and helically of the cutter, said blades being provided with concave cutting edges so that the diameter of the cutter at one end thereof exceeds the diameter of the intermediate portion of said cutter.

3. In a heel breasting machine, a frame, a cutter rotatively mounted in connection with said frame, a work support movable with respect to said frame and cutter, gauge means for determining the operative position of a heel blank on said work support, means for moving said work support toward and from said cutter to present the breast surface of a heel blank carried thereby to said cutter to a predetermined extent, means automatically operable to retain a heel blank in a stationary position on said work support when the heel blank is presented to the cutter, said cutter being so shaped as to produce the convex curve in the breast surface of the heel blank vertically and a concave curve horizontally, and means for rotating said cutter.

'4. In a heel breasting machine, aframje; a. cutter mounted for rotatlon 1n connection with said 'frame'and revoluble about a stationary vertical axis, a pivotallymounted table movable relativelyto said frame and cutter, gaiwe means arranged at one end of said table heel A blank thereon, means for oscillating said table to present the'breast-surface of a heel blank carried thereby to said cutter, au-

tomatic means forclamping the heel blank to said table when the heeliblank is engaged by said cutter, and means for positively mov ing the gaugingmeans to an inactive position during engagement between theheel blank and butter.

5. In a heel breasting machine, a rotary cutter formed to comprise a body from which rigidly projects a plurality of circularly arranged cutting blades which extend longitudinally" and heli'cally of the cutter, said blades being provided with concave cutting edges so that the diameter of the cutter at each end thereof exceeds the diameter. of the intermediate portion of said cutter.

6. In a heel breasting machine, a rotatably mounted cutter, said cutter being formed to comprise a body which carries a plurality of rigidly mounted cutting'bladesysaid blades being disposed in circular order about said body and extending longitudinally and helically with respect to said body,-the cutting edges of said blades being so shaped that the intermediate portion of said cutter possesses a diameter less than the ends of said cutter.

In testimony whereof I aflix my signature.

- FRED A. DAY;

for determining the position of a 

